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cld anyone please tell me which all are the unused pins in mcb 2140 keil board using lpc 2148
Nope there are no details of the unused pins..The schematics gives the complete pin details but which are used and which are unused no
What details do you expect?!
By looking at the schematic, you can see what pins are used - therefore, all other pins must be unused!
The signals without signal names coming out from the processor are not used.
Any a number of signals that has signal names can also be sued, if you just follow the schematics and look where they are going. For example signal names P1.16 to P1.23 are sent to IC6 to drive 8 LED. These signals can be used by you as inputs or outputs. If you don't like the LEDs to flash when using them, then just play with the J6 (LED) strap. Note that P1.16 to P1.23 are also sent to the ETM connector, in case you have hardware to trace the execution of the processor.
A number of other signals can also be seen to be affected by strap fields. For example J2 (AV) will control if signal AVIN is connected to a potentiometer or is available for you to use.
Don't see problems - see possibilities :)
Since the schematics is only two pagers, it should be very easy to deduce what signals that you may use, and what you need to do to use them. Most signals are available around the prototyping area on the board.
thanks a lot for the help
thanks a lot for the info
"Any a number of signals that has signal names can also be sued [...]"
Please don't sue the signals. They are living a hard enough life just being constantly used :)